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Magnesium Sulfate

Last reviewed on RxList: 1/17/2017
Magnesium Sulfate Side Effects Center

Medical Editor: John P. Cunha, DO, FACOEP

Last reviewed on RxList 9/28/2016

Magnesium sulfate injection is a naturally occurring mineral used to control low blood levels of magnesium. Magnesium sulfate injection is also used for pediatric acute nephritis and to prevent seizures in severe pre-eclampsia, eclampsia, or toxemia of pregnancy. Side effects of magnesium sulfate injection include:

  • heart disturbances,
  • breathing difficulties,
  • poor reflexes,
  • confusion,
  • weakness,
  • flushing (warmth, redness, or tingly feeling),
  • sweating,
  • lowered blood pressure,
  • feeling like you might pass out,
  • anxiety,
  • cold feeling,
  • extreme drowsiness,
  • muscle tightness or contraction, or
  • headache.

Less serious side effects of magnesium sulfate injection are more likely, and you may have none at all.

Magnesium sulfate is given in the health-care setting and is not administered at home. The usual dose range of magnesium sulfate injection is 1 to 40 g daily. Magnesium sulfate injection may interact with alcohol, caffeine, smoking, street drugs, and IV (injected) antibiotics. Tell your doctor all medications and supplements you use. Tell your doctor if you are pregnant or plan to become pregnant before receiving Magnesium sulfate injection; it is not expected to harm a fetus. Magnesium sulfate injection passes into breast milk and may harm a nursing baby. Consult your doctor before breastfeeding.

Our Magnesium sulfate elixir Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Magnesium Sulfate Consumer Information

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Tell your caregiver right away if you have:

  • feeling like you might pass out;
  • sweating, anxiety, cold feeling;
  • flushing (warmth, redness, or tingly feeling);
  • weak or shallow breathing;
  • extreme drowsiness, feeling very weak; or
  • numbness or tingly feeling around your mouth, muscle tightness or contraction, overactive reflexes.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the entire detailed patient monograph for Magnesium Sulfate (Magnesium Sulfate Injection)

Magnesium Sulfate Professional Information

SIDE EFFECTS

Flushing, sweating, sharply lowered blood pressure, hypothermia, stupor and ultimately, respiratory depression.

Read the entire FDA prescribing information for Magnesium Sulfate (Magnesium Sulfate Injection)

Related Resources for Magnesium Sulfate

© Magnesium Sulfate Patient Information is supplied by Cerner Multum, Inc. and Magnesium Sulfate Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.

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